Improvement in inking apparatus for printing-presses



A. CAMPBELL.

INKING APPARATUS FOR PRINTING-PRESSES. No.134,946. 1 Patented Nov. 28,1876."

' THE GRAPHIC C0.N.Y

UNITED. STATES PATENT QFFICE.

ANDREW GAMPBELT OF BROOKLYN, NEW YORK.

IMPROVEMENT IN INKING APPARATUS FOR PRINTING-PRESSES.

Specification forming part of Letters Patent N 0. 84,946, dated November28, 1876; application filed January 26, 1876.

To all whom it may concern:

Be it known that I, ANDREW CAMPBELL, of the city of Brooklyn, in thecounty ofK-ings and State of New York, have inventedcertain Improvementsin Inking Apparatus for Printing-Presses, of which the following is aspecifieation:

The improvements which form the subjectmatter of this specification,were included in an application for Letters Patent for improvements inprinting-presses, filed by me December 26, 1871, from which it has beenwithdrawn for the purpose of filing the present application.

The invention relates to certain improved means for adjusting the formand distributing rollers, whereby thewipin g action of the formroller onthe form, which, when repeated, results in the filling up of more orless of the fine lines in the type and engravings, and thereby producinga correspondingly blurred and indistinct impression, is prevented.

In the accompanyingdrawings, Figure l is an end elevation of thedistributing and form rollers, arranged in thein bearings. across-section through the boxes at one end. Fig. 3 is a verticallongitudinal section in line a; as, Fig. 1. Fig. 4 is a verticallongitudinal section of one ofthe boxes of the distributingroller. Fig.5 is an end view of one of the form-rollers and its box detached. Fig. 6is an elevation of a portion of one of the form-rollers, with the box insection in line y y of Fig. 5.

Like letters of referencedesignate like parts in each of the figures.

A is the distributing-roller, and B B the form-rollers, of ordinaryconstruction. E is the bracket-bearingwhich supports the distributingand form rollers at each end. It is secured by bolts to the top of theside ribs of the frame of the machine. 0 are the boxes of thedistributing-roller of cylindrical form, the central portion of which isreduced so as to form a cam, c. D are boxes of the form-rollers,constructed as will presently be explained. To insure a clear anddistinct impression, it is of the utmost importance that the surface ofthe form-rollers travel in perfect unison with the form, so as toprevent the wiping I action which results from a want of such uni- Fig.2 isv formity in the movement of these surfaces. To insure this requireduniformity of motion, it is essential that the surface of theformrollers press equally against the form and the distributing'roller,as an unequal pressure will cause the surface against which the pressureis the greater to act as a driver, which will cause the two othersurfaces in contact to slip or wipe. This will be where there is theleast surface in contact, and which almost always proves to be the form,which causes the finer lines in engravings and type to become more orless filled up, thereby producing a correspondingly blurred andimperfect impression, as hereinafter stated. To prevent this result, itbecomes of the utmost importance to secure and maintain an accuratecentral adjustment of the form-rollers between the two points ofcontact. As the forin rollers are liable to shrink, and consequentlyrequire readjustment, a proper adjustment of these rollers becomes amatter of great difficulty. To insure this required adjustment, Iconstruct the boxes D of the form-rollers with a plane surface, 61, onone side, as shown, and construct a bearing surface against which theyrestinclined, as shown at 0. Theoretically, the faces of these inclinesshould be made with a curve parallel to'a curved line passing throughthe centers of three or more circles of unequal diameter, madetangential to the surface of the form andthe surface of thedistributing-roller, which circles should correspond in diameter to thediameter of the different sizes of form-rollers intended to be used. Forpractical purposes, a line drawn through the centers of two circlescorresponding with, or approximating in diameter, the two extreme sizesof the form-rollers will be sufficiently accurate.

F is a stop and separating cam, arranged in an openingin the center ofthe bracket E, and secured to a shaft, f, the end of which projectsoutsideof the bracket, and terminates in a milled wheel, f, by which thecam is operated. To retain the cam in its proper position, whenadjusted, two holes, ee, are

made in the face of the bracket, and a pin, f

arranged to project from the contiguous face of the hand-wheel andengage in said holes. The inner portion of the hole in the bracketaround the shaft f is enlarged to receive a spiral spring, g, whichoperates to keep the handwheel pressed against the face of the bracket.One of the holes, e, is arranged so that the pin will lock it in theposition shown in Figs. 1 and 3, when it acts as a stopbearing for theform-roller boxes. To prevent the form-rollers from remaining in contactwith the type and distributingfroller when the press is at rest, andthereby impairing the surface of the form-roller, the cam F is turned soas to force outward the form rollers, in which position it is locked andthe rollers kept separate by the pin entering the other hole 0. Theboxes D are adjusted by setscrews 71., which screw through the box andrest with their ends against the edges of the stop F. By turning theseset-screws the rollers are adjusted as they shrink, while their propercentral position between the form and distributing rollers is accuratelymaintained. When adjusted, the boxes are secured in place by a key, I,which is inserted through a hole in the bracket, so that its upper edgewill rest in contact with the central cam c of the distributing rollerbox, while the lower edge rests on the top of the form-roller boxes. Thekey is tightened by turning the box 0, by means of a suitable wrench-thecam operatating as a wedge to press the key firmly against the boxes. Ifthe form-rollers become much reduced in size, a \viderkey will berequired. By constructing the key with a central enlargement on oneedge, and using the key first with this enlargement down, and thenreversing it, when a wider key is required, the necessary increase inthe width of the key inthe latter case will in effect be produced. Toremove the rollers, the key is released by reversing the cam c andwithdrawn. The boxes of the distributing rollers are pushed out of thebracket by sliding them on the shaft, when the roller is readily liftedout.

The form-rollers are removed with their boxes, which are held thereon byset-sc rews m which project into a transverse groove, a, made around theroller-shaft.

What I claim as my invention is- 1. The combination, with the form ortypebed, form-rollers, and distributing-roller, of

the inclined bearings e for the form-roller boxes, substantially as andfor the purpose hereinbefore set forth.

2. The cylindrical box of the distril'iutingroller, constructed with atightening-cam, c, as and for the purpose set forth.

3. The combination of the form'roller boxes, and inclined bearingstherefor, of the lockingkey, and a tightening-cam, a, substantially ashereinbefore set forth.

4. The combination, with the form roller, of the form-roller boxes,provided with an adjusting-screw, h, and attached to the roller so as toenable both together to be removed and replaced without readjustment,except in case of shrinkage, substantially as hereinbefore set forth. vr

5. The combination, with the inclined bearings e, and form-roller boxes,of the adjusting set-screws, and stop-bearings atthe end of theinclines, substantially as hereinbefore set forth.

6. The combination, with the form -roller boxes and inclined bearings,of the stop and roller-swinging cam for separating the formrollers fromcontact with the type and disdistributing roller, when the press isnotin use, substantially as hereinbefore set forth.

7. The combination and arrangement, with the bracket-bearing E, of thecam F, spurs and holes f 0, spring g, and hand-wheel f, as hereinbeforespecified.

ANDREW CAMPBELL.

. Witnesses:

J. J. VAN WINKLE, A. 0. CAMPBELL.

